CMakeLists.txt: Added cxxtest build target and check target for running cxxtest. Fixes #4.
CMakeLists.txt: Added cxxtest build target and check target for running cxxtest. Fixes #4.

nanshe-org/rank_filter,jakirkham/rank_filter,jakirkham/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,DudLab/rank_filter,DudLab/rank_filter